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Cape Spiny Mouse

Acomys subspinosus
LC · Least concern Rodentia Muridae
Cape Spiny Mouse (Acomys subspinosus)
Photo: © Henry de Lange, some rights reserved (CC BY)
Size
14-17 cm + tail 7-8 cm
Weight
~22 g
Activity
Nocturnal
Sociability
Solitary

Description

It lives only in fynbos, the scrub vegetation of south-western South Africa, found nowhere else in the world. There it plays an ecological role that almost nobody associates with a rodent: it disperses and stores the seeds of several plants in the legume family, and is regarded as an occasional pollinator of at least one plant species, feeding on its nectar and carrying pollen between flowers. Like the other spiny mice, it can shed skin from its back if a predator seizes it, and its scaly, almost naked tail breaks off just as easily if it is caught by that.

How to identify it

Small rodent with dark greyish-brown fur on the back and stiff spiny hairs, and a white belly. The eyes and ears are large in proportion to the body, and the tail is long, scaly and fragile. It differs from other spiny mice of southern Africa in its range, which is restricted almost entirely to the Western Cape province.

Signs and tracks

Tiny track, hard to find except on fine substrates. Droppings are small and elongated, 3-4 mm long. The clearest sign is usually the refuge, in crevices between mountain rocks or under dense fynbos scrub, together with partly eaten or stored legume seeds near the entrance.

Habitat and range

Mountain and lowland fynbos in the Western Cape province (South Africa), extending marginally into the Eastern Cape and Northern Cape.

Diet

Seeds, mainly of fynbos legumes, insects, nectar from some flowers, and other small invertebrates.

Behaviour

Its habits are poorly known because the species is so elusive. Breeding is thought to be opportunistic, tied to food availability after fire, a key factor in fynbos dynamics.

Conservation

The species maintains a large, stable population within the fynbos, a habitat that for the most part occupies rocky land unsuited to agricultural transformation, which protects it from most of the threats affecting other species in the region.

Threats

Localised habitat loss to urban and agricultural expansion in the lowlands of the fynbos, and disruption of the natural fire regime.

Other accounts in Muridae

See all species accounts for rodents · Full species index

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